Perhaps it’s not meant to be understood, only to distract us and hold out attention.
Even the reference to “The Big White” is itself a puzzle!
Is this a new term or a reference to some other important work of art, literature, iconic motif in some culture or else merely catchy term coined just for this one picture.
I fear that I might be showing my own narrow education by not figuring this out, but suffice to say it does indeed work as the latter!
Asher